android 自定義長條進度條_android自定義漸變圓環進度條

packagecom.liujing.progressviewdemo;

public class ProgressView extendsView {//分段顔色

private static final int[] SECTION_COLORS ={ Color.GREEN, Color.YELLOW,

Color.RED };private static final String[] ALARM_LEVEL = { "安全", "低危", "中危", "高危"};private floatmaxCount;private floatcurrentCount;private intscore;privateString crrentLevel;privatePaint mPaint;privatePaint mTextPaint;private intmWidth, mHeight;public ProgressView(Context context, AttributeSet attrs, intdefStyleAttr) {super(context, attrs, defStyleAttr);

init(context);

}publicProgressView(Context context, AttributeSet attrs) {this(context, attrs, 0);

}publicProgressView(Context context) {this(context, null);

}private voidinit(Context context) {

mPaint= newPaint();

mTextPaint= newPaint();

}

@Overrideprotected voidonDraw(Canvas canvas) {super.onDraw(canvas);

initPaint();

RectF rectBlackBg= new RectF(20, 20, mWidth - 20, mHeight - 20);

canvas.drawArc(rectBlackBg,0, 360, false, mPaint);

mPaint.setColor(Color.BLACK);

canvas.drawText(score+ "分", mWidth / 2, mHeight / 2, mTextPaint);

mTextPaint.setTextSize(40);if (crrentLevel != null) {

canvas.drawText(crrentLevel, mWidth/ 2, mHeight / 2 + 50,

mTextPaint);

}float section = currentCount /maxCount;if (section <= 1.0f / 3.0f) {if (section != 0.0f) {

mPaint.setColor(SECTION_COLORS[0]);

}else{

mPaint.setColor(Color.TRANSPARENT);

}

}else{int count = (section <= 1.0f / 3.0f * 2) ? 2 : 3;int[] colors = new int[count];

System.arraycopy(SECTION_COLORS,0, colors, 0, count);float[] positions = new float[count];if (count == 2) {

positions[0] = 0.0f;

positions[1] = 1.0f - positions[0];

}else{

positions[0] = 0.0f;

positions[1] = (maxCount / 3) /currentCount;

positions[2] = 1.0f - positions[0] * 2;

}

positions[positions.length- 1] = 1.0f;

LinearGradient shader= new LinearGradient(3, 3, (mWidth - 3)* section, mHeight - 3, colors, null,

Shader.TileMode.MIRROR);

mPaint.setShader(shader);

}

canvas.drawArc(rectBlackBg,180, section * 360, false, mPaint);

}private voidinitPaint() {

mPaint.setAntiAlias(true);

mPaint.setStrokeWidth((float) 40.0);

mPaint.setStyle(Style.STROKE);

mPaint.setStrokeCap(Cap.ROUND);

mPaint.setColor(Color.TRANSPARENT);

mTextPaint.setAntiAlias(true);

mTextPaint.setStrokeWidth((float) 3.0);

mTextPaint.setTextAlign(Paint.Align.CENTER);

mTextPaint.setTextSize(50);

mTextPaint.setColor(Color.BLACK);

}private int dipToPx(intdip) {float scale =getContext().getResources().getDisplayMetrics().density;return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));

}public intgetScore() {returnscore;

}publicString getCrrentLevel() {returncrrentLevel;

}public voidsetCrrentLevel(String crrentLevel) {this.crrentLevel =crrentLevel;

}public floatgetMaxCount() {returnmaxCount;

}public floatgetCurrentCount() {returncurrentCount;

}public void setScore(intscore) {this.score =score;if (score == 100) {this.crrentLevel = ALARM_LEVEL[0];

}else if (score >= 70 && score < 100) {this.crrentLevel = ALARM_LEVEL[1];

}else if (score >= 30 && score < 70) {this.crrentLevel = ALARM_LEVEL[2];

}else{this.crrentLevel = ALARM_LEVEL[3];

}

invalidate();

}

public void setMaxCount(floatmaxCount) {this.maxCount =maxCount;

}

public void setCurrentCount(floatcurrentCount) {this.currentCount = currentCount > maxCount ?maxCount : currentCount;

invalidate();

}

@Overrideprotected void onMeasure(int widthMeasureSpec, intheightMeasureSpec) {int widthSpecMode =MeasureSpec.getMode(widthMeasureSpec);int widthSpecSize =MeasureSpec.getSize(widthMeasureSpec);int heightSpecMode =MeasureSpec.getMode(heightMeasureSpec);int heightSpecSize =MeasureSpec.getSize(heightMeasureSpec);if (widthSpecMode ==MeasureSpec.EXACTLY|| widthSpecMode ==MeasureSpec.AT_MOST) {

mWidth=widthSpecSize;

}else{

mWidth= 0;

}if (heightSpecMode ==MeasureSpec.AT_MOST|| heightSpecMode ==MeasureSpec.UNSPECIFIED) {

mHeight= dipToPx(15);

}else{

mHeight=heightSpecSize;

}

setMeasuredDimension(mWidth, mHeight);

}

}